Light-weight aggregate produced by using coal gangue

A technology of coal gangue and light aggregates, which is applied in the field of solid waste treatment and resource utilization, can solve the problems of unguaranteed moisture content of light aggregates, no light aggregates found, and uncontrollable pozzolanic activity.

Inactive Publication Date: 2014-06-25
李荣怀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the spontaneous combustion coal gangue aggregate production method is that the pozzolanic activity of coal gangue aggregate cannot be controlled during the spontaneous combustion of coal gangue, and the activity is relatively low.
Because the coal ga...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A light aggregate produced from coal gangue. The raw material is unburned coal gangue. The coal gangue has a calorific value of 3000KJ / Kg and a particle size of 5mm.

[0017] Above a kind of light aggregate that utilizes coal gangue to produce, its production method steps are as follows:

[0018] 1). Select the calorific value of 3000KJ / Kg coal gangue, remove the debris, and crush it to a particle size of 5mm.

[0019] 2). Put the coal gangue crushed to a particle size of 5mm into a rotary kiln for thermal activation, and the temperature in the rotary kiln is controlled at 850°C.

[0020] 3). After the combustibles of the coal gangue in the rotary kiln are fully burned, they leave the kiln to cool naturally and enter the warehouse, and keep them in a dry state for use.

Embodiment 2

[0022] A kind of light aggregate produced by using coal gangue. The raw material is unburned coal gangue. The calorific value of coal gangue is 6000KJ / Kg, and the particle size is 12mm. .

[0023] Above a kind of light aggregate that utilizes coal gangue to produce, its production method steps are as follows:

[0024] 1). Select the calorific value of 6000KJ / Kg coal gangue, remove the debris, and crush it to a particle size of 12mm.

[0025] 2). Put the coal gangue crushed to a particle size of 12mm into the rotary kiln for thermal activation, and the temperature in the rotary kiln is controlled at 750°C.

[0026] 3). After the combustibles of the coal gangue in the rotary kiln are fully burned, they leave the kiln to cool naturally and enter the warehouse, and keep them in a dry state for use.

Embodiment 3

[0028] A light aggregate produced by using coal gangue. The raw material is unburned coal gangue. The calorific value of coal gangue is 1KJ / Kg and the particle size is 0.16mm. .

[0029] Above a kind of light aggregate that utilizes coal gangue to produce, its production method steps are as follows:

[0030] 1). Select the calorific value of 1KJ / Kg coal gangue, remove the debris, and crush it to a particle size of 0.16mm.

[0031] 2). Put the coal gangue crushed to a particle size of 0.16mm into a rotary kiln for thermal activation, and the temperature in the rotary kiln is controlled at 750°C.

[0032] 3). After the combustibles of the coal gangue in the rotary kiln are fully burned, they leave the kiln to cool naturally and enter the warehouse, and keep them in a dry state for use.

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Abstract

The invention aims to provide a production method of a light-weight aggregate used for industrial and civil buildings, and in particular relates to the light-weight aggregate produced by using coal gangue. The light-weight aggregate is characterized in that a production raw material of the coal gangue light-weight aggregate is unburned coal gangue; the coal gangue is selected from mining gangue or washing gangue of a coal preparation plant; the particle size range of the coal gangue light-weight aggregate is 0.16-40mm; the coal gangue has a certain heating power, and the caloric value is 1-6276KJ/Kg; the coal gangue is crushed into particles with the particle size of 0.16-40mm, is put into a rotary kiln, and then is subjected to thermal activation at the thermal activation temperature of 650-1250 DEG C.

Description

technical field [0001] The invention relates to a production method of light aggregate for industrial and civil buildings, in particular to a light aggregate produced by using coal gangue, which belongs to the field of solid waste treatment and resource utilization. Background technique [0002] With the continuous development of coal production, the output of coal gangue is increasing day by day. More than 100 million tons of coal gangue are added every year, and the accumulated coal gangue has exceeded 3 billion tons over the years. It covers an area of ​​more than 50,000 mu and has formed more than 1,500 large-scale gangue Mountain. Such a large amount of coal mine waste not only occupies a large amount of land and causes serious pollution to the environment, but also a waste of resources. Do a good job in coal gangue treatment and resource utilization, and use coal gangue to produce industrial and civil building light aggregates, which will not only create social benefi...

Claims

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Application Information

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IPC IPC(8): C04B18/12C04B20/04
CPCY02W30/91
Inventor 李荣怀
Owner 李荣怀
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